SOLAR CONTROL GLASS OBJECT

Abstract

A heat-treatable solar control glass object (100) having a pink or copper colored glass side reflection that includes a transparent glass substrate (110) equipped with a multilayer coating (200) having solar control properties is disclosed. The multilayer coating (200) includes one or more nickel or niobium alloy nitride functional layers (120), each of which is sandwiched between two transparent dielectric layers (130a, 130b). The thickness of the dielectric layer (130b) provided over the functional layer (120) is greater than 100 nm and less than 160 nm and the dielectric layer (130a) provided over the transparent glass substrate (110) is greater than 5 nm and less than 20 nm. The heat-treatable solar control glass object (100) exhibits a pink or copper colored reflection on the side opposite to the side provided with the multilayer coating (200).

Description

Description of SOLAR CONTROL GLASS OBJECT Invention Engineering Field The present disclosure generally relates to coated glass articles, and more specifically to heat-treatable solar control glass articles having a pink or copper colored external reflection. Background of the Invention Solar-controlled glass has a significant role to play in the future of construction, as external temperatures continue to rise, and so do comfort expectations. Residential and non-residential buildings that use more energy than necessary to stay cool are a major source of unnecessary CO2 emissions. Reducing unnecessary CO2 emissions is the need of the hour, and solar-controlled glass is a welcome development in this regard. The microscopically thin multilayer coating technique for producing such solar-controlled glass is well-known in the field. Color matching of coated solar control objects (before heat treatment vs. after heat treatment) is also a requirement today, where large quantities of glass objects are produced, cut to desired sizes, and heat treated for safety. In such cases, it is often desirable that the heat-treated objects match their untreated counterparts with respect to color, reflectance, transmittance, and the like for architectural and aesthetic purposes. Solar control coatings having a glass / Si3N4 / NiCr / Si3N4 layer stack are known in the art, where the metallic NiCr layer is the only infrared (IR) reflecting layer in the coating. In certain cases, the IR reflecting NiCr layer can be nitrided. While such layer stacks provide efficient solar control and low Δε* values ​​(more color matching), the reflectance colors obtained by such layer stacks have not been worked out. For example, known solar control coatings having a glass / Si3N4 / NiCrN / Si3N4 layer stack have external a* values ​​in the range from -8 to +2; and b* values ​​in the range from -2 to +8. This implies that a glass object with the above solar control layer stack will have a neutral or green or yellow-green color in external reflectance. Referring to US patent number 6926967 describes a heat-treatable coated article with NiCrN acting as an IR-reflecting layer. While the invention relates to achieving approximately the same color characteristics as seen with the naked eye before and after heat treatment, the external reflection color obtained by the coated article is not explicitly disclosed. The glass article coated with the solar control coating has an external glass side a* value ranging from 0 to -2.5 and a b* value ranging from 0 to 3; and a transmittance a* value ranging from 0 to 2 and a b* value ranging from -3 to -9. The examples described in the patent further reveal the color change (ΔE*) after heat treatment.However, a glass object that has external a* and b* values ​​equal to 0 will show a neutral color and a glass object that has external a* and b* values ​​equal to -2.5 and 3, respectively, will show a greenish yellow color. Referring to publication number PCT 2017144828 owned by the recipient of this disclosure, it relates to a laminated glaze equipped with a thin layer stack for solar control that includes a Si3N4 / NiCrN / Si3N4 layer on the glass surface. The glaze is reported to have a neutral reflectance so as not to cause discomfort to the user. Despite all the past experience and technology available for producing solar control glass, it has been found that while these coated glass are effective in solar control and have a better color match, the layer stack has never been engineered to have different reflectance colors. Therefore, there is scope for achieving different reflectance colors while maintaining solar control properties and low Δε* values. For example, most of the solar control glass glass currently available in the market has a neutral yellow or greenish yellow color in external reflection. A study of emerging market trends reveals that this neutral / greenish color is not to everyone's liking and may not be suitable for every type of building.Because these solar control objects are generally more expensive than their regular counterparts, it becomes even more important to ensure that the additional costs are justified by the combined features of the coated objects. Furthermore, it has been found that the external and internal reflection colors of these coated objects can be enhanced by machining the dielectric layer of the solar control layer stack. The external reflection of the solar control coated object can be varied by varying the coating thickness of the Si3N4 layer of the solar control layer stack which unfortunately produces undesirable interference in multilayer coatings. The present disclosure relates to a heat-treatable solar control glass article comprising a thin multilayer stack comprising an alloy nitride functional layer sandwiched between two transparent dielectric layers provided on one side of a transparent substrate. The thickness of the alloy nitride functional layer and the dielectric layer is designed such that it provides a pink or copper colored external appearance on the other side of the transparent substrate while still maintaining its solar control properties and low ΔE* values, without undue interference with other properties of the multilayer stack. Thus, this coating can block a portion of the solar spectrum very efficiently in addition to having a pink or copper colored appearance from the outside of a building.Furthermore, the coated object can be used as a heat-treated and non-heat-treated object and if the heat treatment shows a high color match with its non-heat-treated counterpart. Light transmission from the exterior to the interior of a building combined with this heat-treated solar control glass object is also reduced, thus reducing glare for building occupants. Invention Summary In one aspect of the present disclosure, a heat-treatable solar controlled glass article having a pink or copper colored glass side reflection comprising a transparent substrate having a first surface provided with a thin multilayer coating. The multilayer coating includes one or more nickel or niobium alloy nitride functional layers, each sandwiched between two transparent dielectric layers. The thickness of the dielectric layer provided over the functional layer is greater than 100 nm and less than 160 nm and the thickness of the dielectric layer provided over the transparent substrate is greater than 10 nm and less than 40 nm. Other features and aspects of this disclosure will be apparent from the following description and accompanying drawings. Short Description of Image Embodiments are illustrated by way of example and are not limited to those shown in the accompanying drawings. Figure 1 illustrates a heat-treatable solar control glass object, according to one embodiment of the present disclosure; Figure 1A illustrates a heat-treatable solar control glass object, according to another embodiment of the present disclosure; Figure 2 depicts a transparent substrate, according to one embodiment of the present disclosure; and Figure 3 depicts a pink or copper colored solar control glass object, according to another embodiment of the present disclosure. Those skilled in the art will appreciate that elements in the drawings are drawn for simplicity and clarity and need not be drawn to scale. For example, the dimensions of some elements in the drawings may be enlarged relative to other elements to help improve understanding of embodiments of the invention. Complete Description of the Invention Where possible, the same reference number will be used throughout the drawings to refer to the same or similar parts. The embodiments disclosed herein relate to heat-treatable solar-controlled glass articles having a pink or copper colored glass side reflection. A heat-treatable solar control glass object (100) according to one embodiment of the present disclosure is depicted in Figure 1. The heat-treatable solar control glass object (100) includes a glass substrate (110) provided with a multilayer coating (200). The multilayer coating (200) includes at least one nickel or niobium alloy nitride functional layer (120), each sandwiched between two transparent dielectric layers (130a), (130b). The dielectric layer (130a) is in direct contact with the glass substrate (110) and the dielectric layer (130b) is provided over the alloy nitride functional layer (120). The alloy nitride functional layer (120) includes at least one nitride of a metal alloy selected from the group consisting of NbCr, NiCr, NiCrMo and NbZr. In particular embodiments, the alloy nitride functional layer (120) includes nickel, chromium and nitrogen. The transparent dielectric layers (130a), (130b) are based on aluminum nitride, aluminum oxynitride, silicon nitride or silicon oxynitride or silicon aluminum nitride, tin oxide, a mixture of zinc oxide and tin or titanium oxide. In particular embodiments, the transparent dielectric layers (130a), (130b) are silicon nitride. Optionally, the multilayer coating (200) may further include an overlayer (140) provided over the transparent dielectric layer (130b). Figure 1A illustrates a heat-treatable solar controlled glass object (100) according to another embodiment of the present disclosure. The overlayer (140) includes at least one metal oxide selected from the group consisting of titanium, chromium or zirconium or their alloys or combinations. The overlayer (140) if present improves the mechanical resistance of the multilayer coating (200) such as scratch resistance etc. However, the optical properties of the multilayer coating (200) remain unchanged. In one embodiment of the present disclosure, the thickness of the nickel or niobium alloy nitride functional layer (120) is greater than 5 nm and less than 20 nm. The thickness of the nickel or niobium alloy nitride functional layer (120) is adjusted to achieve the desired light transmission through the heat-treatable solar controlled glass object (100). In another embodiment of the present disclosure, the thickness of the transparent dielectric layers 130a, 130b is adjusted to optimize the reflectance and color of the transparent glass substrate (110). In one embodiment, the thickness of the dielectric layer (130b) provided over the nickel or niobium alloy nitride functional layer (120) is greater than 100 nm and less than 160 nm and the thickness of the dielectric layer (130a) in direct contact with the glass substrate (110) is greater than 10 nm and less than 40 nm.Increasing the thickness of the dielectric layer (130b) results in positive a* and b* values ​​(measured on the glass side G) that range between ( + 8 and +12) and (+2 and +12), respectively. In one embodiment, a multilayer coating (200) is applied to a transparent glass substrate (110) by physical vapor deposition using a magnetron sputtering. In alternative embodiments, other suitable coating techniques may be used to obtain the multilayer coating (200). The inventors of the present disclosure have discovered that the external reflectance of said solar control glass objects can be varied by varying the thickness of the dielectric layers (130a), (130b). More specifically, it has been surprisingly and unexpectedly discovered that engineering thicknesses of these dielectric layers (130a), (130b) achieve aesthetically enhanced solar control glass objects that retain solar control and other performance properties. Figure 2 depicts a glass substrate (110) equipped with a multilayer coating (200) of the present disclosure. In some embodiments, the glass substrate (110) may be clear glass or tinted glass. The multilayer coating (200) is provided on the coating side (C) 203 of the transparent substrate (110). When the heat-treatable solar control glass object (100) of the present disclosure is installed inside a building, the coating side (203) equipped with the multilayer coating (200) faces the inside of the building. In such arrangement, the glass side (G) (202) opposite the coating side (C) (203) of the transparent substrate (110) exhibits a pink reflection or a copper reflection depending on the thickness of the dielectric layer (130a), 130b when viewed from the outside of the building. The thickness of the dielectric layer (130b) provided over the nickel or niobium alloy nitride functional layer (120) is increased to increase the a* value (measured on the glass side G) of the heat-treatable solar control glass object (100). The positive a*(a*G Value~10) value provides a reddish appearance on the glass side (G) (202) opposite the coating side (C) (203) (provided with a multilayer coating (200)) of the transparent substrate (110) which contributes to the pink / copper color reflection of the heat-treatable solar control glass object (100) on the glass side (G) (202). Similarly, the b* value (measured on the glass side G) is also engineered to a positive value. A positive b* value (b*G~3) in combination with a positive a* value (preferably, a*G>b*G) results in a pink reflection of the heat-treatable solar control glass object (100) on the glass side (G) (202).Likewise, a b* value (b*G~10) in combination with a positive a* value (preferably, a*G>b*G) results in a copper colored reflection of the heat-treatable solar controlled glass body (100) on the glass side (202). The light transmittance of the heat-treatable solar controlled glass body (100) ranges between 10% and 60% depending on the thickness of the alloy nitride functional layer (120). A heat-treatable solar control glass object having a pink or copper colored external reflection (300) according to one particular embodiment is depicted in FIG. 3. The heat-treatable solar control glass object having a pink or copper colored external reflection (300) includes a transparent glass substrate (110) provided with a multilayer coating (200) that includes a nickel chromium nitride layer (302) sandwiched between two transparent dielectric layers (303a), (303b) based on silicon nitride. The thickness of the nickel chromium nitride layer (302) is in the range of between 5 nm and 20 nm. The nickel chromium nitride layer (302) acts as an IR blocking layer of the multilayer coating (200) and is associated with the solar control properties of the heat-treatable solar control glass object having a pink or copper colored external reflection (300). While the solar control properties depend entirely on the thickness of the nickel chromium nitride (302) layer, the light transmittance (TL) of a heat-treatable solar control glass object having a pink or copper (300) external reflection is always proportional to the thickness of the nickel chromium nitride (302) layer. Therefore, it becomes important to have a balance between the solar control properties and the light transmittance (TL) values ​​of a heat-treatable solar control glass object having a pink or copper (300) external reflection. Thus a thickness range between 5 nm and 20 nm of the nickel chromium nitride (302) layer provides the desired light transmittance (TL) while also maintaining the solar control properties of a heat-treatable solar control glass object having a pink or copper (300) external reflection. The thickness of the silicon nitride layer (303a) present on the transparent glass substrate (110) ranges between 10 nm and 40 nm and the thickness of the silicon nitride layer (303b) present on the nickel chromium nitride layer (302) ranges between 100 nm and 160 nm. The silicon nitride dielectric layers (303a), (303b) contribute to the reflection color of the heat-treatable solar control glass object having a pink or copper external reflection (300) and are therefore designed such that the glass side G of the transparent glass substrate (110) reflects a pink or copper color. Consequently, the coating side C of the transparent glass substrate (110) reflects a greenish-yellow color. The multilayer coating (200) has ~10% external reflection and provides a highly polished appearance. In one aspect of the embodiment, the heat-treatable solar control glass object having a pink or copper external reflection (300) may be enameled.In some aspects of the embodiment, the heat-treatable solar controlled glass article having a pink or copper colored external reflection (300) may be strengthened, hardened or heated to a temperature range between 500°C and 750°C. The multilayer coating (200) can be heat treated and the transparent glass substrate (110) coated with the multilayer coating (200) can be heat treated to a temperature as high as 630oC for about 9 minutes. The δε* value (color change of the heat-treatable solar controlled glass object having a pink or copper external reflection (300) before and after heat treatment) is less than 3.5. The emissivity of the heat-treatable solar controlled glass object having a pink or copper external reflection (300) decreases slightly after heat treatment. The heat-treated solar controlled glass object having a pink or copper external reflection shows higher IR reflection than standard glass.Heat-treatable solar control glassware (300) having a pink or copper external reflection and heat-treatable solar control glassware (300) having a pink or copper external reflection exhibit high resistance values. In one embodiment of the present disclosure, a composite glaze comprising a plurality of glass substrates bonded together by a polymer interlayer is disclosed. One or more of the glass substrates of the plurality of glass substrates may be a pink or copper solar control glass body (300) or a heat-treated pink or copper solar control glass body. In one aspect of the embodiment, the polymer interlayer is made of polyvinyl butyl (PVB) and / or other organic polymers selected from the group consisting of polyurethane and / or ethylvinylacetate (EVA) and / or polyvinyl chloride and / or polyester and / or polyethylenevinylacetate (PET) and / or polycarbonate and / or polypropylene and / or polyethylene and / or polyurethane or combinations thereof. In the following examples, the layer stacks are deposited with a magnetically enhanced (magnetron) sputtering at room temperature on a transparent glass substrate having a thickness of 6 mm. Example 1 Pink Solar Control Glass Bodies clear glass substrate and green glass substrate are coated with the layer stack shown below: Layer Stack 1: Glass / / SisN4 (33 nm) / NiCrNx (9 nm) / SisN4 (141 nm) The optical properties of glass samples coated with layer 1 are summarized in Table 1. Table 1: Optical Properties of Red Solar Controlled Glass Objects Guava Tl Outer Side Inner Side Emissivity Solar Factor Reks a*G b*G Rint a*C b*C Ε SF Stack Layer 1 (Clear) 31 10 12 3.3 34 -9 8.3 0.6 44 Stack Layer 1 (Green) 25.6 8 6 2 33 -9 8.3 0.6 34.2 Reks= External reflection; a*G, b*G = a*, b* values ​​measured on the external side, i.e. the glass side; Rint= Internal reflection; a*C, b*C = a*, b* values ​​measured on the internal side, i.e. the coating side Layer stack 1 exhibits a pink appearance on the glass side (i.e., on the building exterior) and a greenish-yellow color on the coating side (on the building interior) when applied to a clear glass substrate. When layer stack 1 is applied to a green glass substrate, although the glass side reflection of the coated glass substrate appears reddish, the desired pink reflection is better achieved when using a clear glass substrate. It is shown that layer stack 1 having a reduced NiCrNx thickness records a light transmittance (TL) of 31%. The transparent glass has an emissivity of 89%, while the pink solar controlled glass object according to an embodiment of the present disclosure has an emissivity of less than 60%. The brightness of the external color reflected by the coated glass substrate can be varied by varying the reflectance value (Rex). Example 2 Copper Colored Solar Control Glass Object The glass substrate is coated with the layer stack shown below: Layer Stack 2: Glass / / Si3N4 (33 nm) / NiCrNx (11.4 nm) / Si3N4 (134.4 nm) The optical properties of glass samples coated with layer 2 stack are summarized in Table 2. Table 2: Optical Properties of Copper-Colored Solar Control Glass Objects Tl Outer Side Inner Side Rex Emissivity a*G b*G Rint a*C b*C Ε Stack Layer 2 25.2 13 8.6 9.9 38 -8.8 7.5 0.5 Rex= external reflection; values ​​a*G, b*G = a*, b* measured on the external side, namely the glass side; Rint Internal reflection; The values ​​a*C, b*C = a*, b* measured on the internal side, namely the coating side The glass substrate coated with layer 2 exhibits a copper-colored appearance on the glass side (G). The internal reflectance (Rint) is found to be high at 38%. However, the external reflectance (Reks) is lower making the reflected color of the heat-treatable solar control glass appear subtle. The brightness of the external color 20 reflected by the coated glass substrate can be varied by varying the reflectance (Reks) value. Example 3 Heat treatment The glass substrates coated with layer stacks 1 and 2 were subjected to heat treatment at 630oC for about 9 minutes and the changes in internal color, external color and transmittance values ​​before and after heat treatment were measured and tabulated in table 3. It is evident from the table that both layer stacks 1 and 2 have δε* values ​​less than or equal to 3.5 in both color and transmittance. This property brings about a high color match between the pink or copper colored solar control glass objects and the heat-treated pink or copper colored solar control glass objects. Table 3: Color Change and Transmission Transmission Color Change δε* Internal Color ΔΕ* External Color ΔΕ* Layer Stack 1 1 3.5 2 Layer Stack 2 0.9 2.9 1.6 Further, the value of sheet resistance and emissivity of the glass substrate equipped with layer stacks 1 and 2 was measured before and after heat treatment (HT) and the results are tabulated in table 4. It was proven that after strengthening the sheet resistance and emissivity of stack layers 1 and 2 were reduced. This shows that the IR reflector material is better after strengthening. Table 4: Sheet Resistance and Emissivity Measurement Sheet Resistance (Ohms / squared) Emissivity Before After Before After HT* HT* HT* HT* Stack Layer 1 119 55 0, 57 0, 47 Stack Layer 2 93 46 0, 51 0, 46 *HT - Heat Treated Resilience Study The following durability studies were performed for glass substrates coated with layer stacks 1 and 2. Erichsen comb testing This test is used to evaluate the resistance of a coating stack to erosion caused by rubbing. In this test, a fine brush is rubbed against the coating while it is submerged in water. This test is performed to assess mechanical resistance to the washing machine brush during processing. The samples were cured at 630°C after the Erichsen brush test. This step revealed minor scratches that occurred during the testing procedure. However, the tested samples showed no signs of scratches. In another experiment, samples coated with both layer 1 and layer 2 were first cured at temperatures above 630°C and then subjected to the Erichsen brush test procedure. Again, the samples showed no signs of minor scratches or coating erosion. Taber Abrasion Test The Taber abrasion test was used to perform accelerated wear resistance testing. This involved mounting a flat sample of approximately 100 mm2 onto a rotary table platform rotating about a vertical axis at a constant speed. The wear action was performed with two rotating abrasive wheels supported on a loading arm that applied a pressure of 250 grams to the specimen, excluding the weight of the wheels in contact with the sample. The transmission before and after the test was measured to calculate the overall change in transmission of the test sample. The results of the mechanical durability study are summarized in Table 5. Table 5: Results of the Resilience Study Test Name Target / Specification Result Layer 1 Stack Layer 2 Erichsen Brush Test (1000 cycles) No visible pin holes, scratches or erosion Pass Pass Color change <2 0.9 1.1 Taber Abrasion Test 2000 cycles using CS-10F wheel After abrasion, no significant change in TL Pass Pass Transmission change ΔΤ<2 0.8 1.2 It should be noted that the above examples are indicative only and are incorporated in the specification for instructional purposes only and do not further limit the scope of the invention in any way. Comparative Example 1 The clear glass substrate is coated with the layer stack shown below: Layer Stack 3: Glass / / SisN4 (33 nm) / NiCrNx (9 nm) / SisN4 (95 nm) Layer Stack 4: Glass / / Si3N4 (33 nm) / NiCrNx (9 nm) / Si3N4 (165 nm) The optical properties of glass samples coated with stacked layers 3, 4 & 5 are summarized in Table 6. Table 6: Optical Properties of Coated Solar Control Glass Objects Tl Outer Side Inner Side Solar Factor Reks a*G b*G Rint a*C b*C SF Stack Layer 3 43.3 25.5 -2.5 21.6 9.8 -1.6 -35 48 Stack Layer 4 33.3 10 7.7 -22.1 28.5 -4 46 44 Reks = External reflection; the values ​​a*G, b*G = a*, b* measured on the external side, namely the glass side; Rint = Internal reflection; The values ​​a*C, b*C = a*, b* measured on the internal side, namely the coating side The glass substrate coated with layer stack 3 exhibits a yellow reflection from its b*G value and therefore exhibits a gold external reflection. Similarly, the glass substrate coated with layer stack 4 exhibits a purple external reflection. This external reflection color is undesirable and is believed to be a result of the dielectric layer overlying the functional layer having a thickness below the lower limit and above the upper limit of the desired thickness range described in the teachings of this disclosure. Industry Applicability The heat-treatable solar controlled glass articles (100) of the present disclosure can be used in monolithic, double or triple glazing. These glazes are applied in such a way that the multilayer coating is preferred on the surface (2), the substrate surfaces are numbered from the outside to the inside of the building or room equipped therewith, thereby providing a solar radiation protection effect. These glazes exhibit an emissivity value equal to or less than 80%. The heat-treatable solar controlled glass articles (100) can also be used in constructing wall cladding panels of building walls for interior applications. Furthermore, the heat-treatable solar controlled glass articles (100) can also be used as side windows, rear windows or solar roofs for automobiles or other vehicles. The heat treatable solar controlled glass articles (100) of the present disclosure can also be enameled, strengthened or toughened and used for interior building applications. Durability studies of these heat treatable solar controlled glass articles (100) provide a longer service life for these articles. Furthermore, the heat treatable solar controlled glass articles (100) due to their solar controlled properties and aesthetically enhanced appearance can also be used as side windows, rear windows or solar roofs for automobiles or other vehicles. Furthermore, the heat treatable solar controlled glass articles (100) of the present disclosure can be used to produce composite glazes i.e. laminated glazes and additionally have the advantage of being able to be used as annealed, heat strengthened and toughened glass articles. Note that not all of the activities described above in the general description or examples are required, that some of the activities may not be required, and that one or more further activities may be performed in addition to those described. Furthermore, the order in which the activities are listed does not require the order in which they should be performed. Benefits, other advantages, and solutions to problems have been described above with respect to particular embodiments. However, any benefits, advantages, solutions to problems, and features that may cause such benefits, advantages, or solutions to occur or become more apparent should not be construed as critical, mandatory, or essential features of any or all of the claims. The specifications and illustrations of the embodiments described herein are intended to provide a general understanding of the structure of the various embodiments. They are not intended to be a complete and exhaustive description of all elements and features of equipment and systems using the structures or methods described herein. Certain features, for clarity, described herein in the context of separate embodiments, may also be provided in combination within a single embodiment. Conversely, various features, for brevity, described within the context of a single embodiment, may also be provided separately or in subcombinations. Furthermore, references to stated values ​​within a range include any value within that range. Many other embodiments may be apparent to the skilled person only after reading this specification.Other embodiments may be used and derived from the disclosure, so that structural substitutions, logical substitutions, or other changes may be made without departing from the scope of the disclosure. Accordingly, the disclosure is considered to be illustrative rather than limiting. The descriptions in combination with the illustrations are provided to aid in understanding the teachings expressed here, are provided to assist in explaining the teachings, and should not be construed as limiting the scope or application of the teachings. However, other teachings may certainly be used in this application. As used herein, the terms include, which includes, comprises, which includes, having, which has or other variations, are intended to encompass non-exclusive inclusion. For example, a method, article, or apparatus that includes a list of features is not necessarily limited to those features but may include other features not expressly listed or inherent to the method, article, or apparatus. Furthermore, unless expressly stated otherwise, or refers to inclusive-or and not to exclusive-or. For example, condition A or B is satisfied by any of the following: A is true (or exists) and B is false (or does not exist), A is false (or does not exist) and B is true (or exists), and both A and B are true (or exist). In addition, the use of a is used to describe the elements and components described herein. This is done solely for convenience and to provide a general understanding of the scope of the invention. This description should be read to include one or at least one and the singular also includes the plural, or vice versa, unless it is clear that the intent is otherwise. For example, when one item is described herein, more than one item may be used in place of one item. Similarly, when more than one item is described herein, one item may be substituted for more than one of those items. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as those generally understood by one having ordinary skill in the art. Materials, methods, and examples are illustrative only and are not intended to be limiting. To the extent that specific details regarding specific materials and processing measures are not described, such details may include conventional approaches, which can be found in reference books and other sources in the field of manufacturing. While aspects of the present disclosure have been specifically shown and explained with reference to the above embodiments, it will be understood by those skilled in the art that various additional embodiments may be envisaged by modifications to the disclosed machines, systems and methods without departing from the spirit and scope of what is disclosed. Such embodiments should be understood to be within the scope of the present disclosure as determined by the claims and their equivalence. List of Elements TITLE: SOLAR CONTROLLED GLASS OBJECT 100 Heat-Treatable Solar Control Glassware 110 Glass Substrate 120 Alloy Nitride Functional Coating 130a Dielectric Coating 130b Dielectric Coating 140 Covering Layer 200 Multilayer Coating 202 Glass Side (G) 203 Coating Side (C) 300 Heat-Treatable Solar Control Glassware Having a Pink or Copper External Reflectance 302 Nickel Chromium Nitride Coating 303a Silicon nitride Coating 303b Silicon nitride Coating

Claims

1. A heat-treatable solar controlled glass object (100) having a pink or copper colored glass side reflection comprising: a transparent glass substrate (110) having a first surface provided with a thin multilayer coating (200) comprising: one or more Ni or Nb alloy nitride functional layers (120), each sandwiched between two transparent dielectric layers (130a), (130b), wherein the thickness of the dielectric layer (130b) provided over the functional layer (120) is greater than 100 nm and less than 160 nm and the thickness of the dielectric layer (130a) provided over the transparent substrate (110) is greater than 10 nm and less than 40 nm, characterized in that the functional layer (120) includes a nitride of a metal alloy selected from NbCr, NiCr, NiCrMo or NbZr and the transparent dielectric layers (130a), (130b) are based on aluminum nitride, aluminum oxynitride, silicon nitride, silicon oxynitride,silicon aluminum nitride, tin oxide, a mixture of zinc oxide and tin or titanium oxide., 2. The heat-treatable solar controlled glass object (100) according to claim 1, wherein the thickness of the transparent dielectric layer (130a), (130b) is adjusted to optimize the reflectance and color of the transparent substrate (110) on the side opposite to the side provided with the multilayer coating.

3. The heat-treatable solar control glass object (100) according to claim 1, wherein the thickness of the functional layer (120) is greater than 5 nm and less than 20 nm.

4. The heat-treatable solar controlled glass object (100) according to claim 1, wherein the multilayer coating (200) is applied to the coating side (203) of the transparent glass substrate (110).

5. The heat-treatable solar controlled glass object (100) according to claim 1, wherein the thickness of the functional layer (120) and the thickness of the transparent dielectric layer (130a), (130b) are adjusted to provide a pink reflection on a surface opposite to a first surface of the transparent glass substrate (110) provided with a thin multilayer coating (200).

6. The heat-treatable solar controlled glass object (100) according to claim 1, wherein the thickness of the functional layer (120) and the thickness of the transparent dielectric layer (130a), (130b) are adjusted to provide a copper colored reflection on a surface opposite to a first surface of the transparent glass substrate (110) provided with a thin multilayer coating (200).

7. The heat treatable solar controlled glass article (100) according to claim 1, wherein the thin multilayer coating (200) optionally includes a cover layer (140) provided over the functional layer (120) which includes at least one metal oxide selected from the group consisting of titanium, chromium or zirconium or an alloy or combination thereof.

8. The heat-treatable solar controlled glass object (100) according to claim 1, wherein the transparent glass substrate (110) is made of clear glass or colored glass.

9. A heat-treatable solar control glass object (100) according to claim 1, wherein the heat treatment involves heating to a temperature above 500°C and below 750°C to obtain a heat-treated solar control glass object.

10. The heat-treatable solar controlled glass article (100) according to claim 1 having δε* less than or equal to 3.5 on the air side and the side opposite to the air side and a light transmittance ranging from 10% to 60%.

11. The heat-treatable solar control glass article (100) according to claim 1 can be enameled.

12. A composite glaze comprising: a plurality of glass substrates and at least one polymer interlayer configured to bond the plurality of glass substrates, wherein the at least one glass substrate is a heat-treatable solar controlled glass article according to claim 1.

13. The composite glaze according to claim 12, wherein the polymer interlayer is made of polyvinyl butyral (PVB) and / or other organic polymers selected from the group consisting of polyurethane and / or ethylvinylacetate (EVA) and / or polyvinyl chloride and / or polyester and / or polyethylenevinylacetate (PET) and / or polycarbonate and / or polypropylene and / or polyethylene and / or polyurethane or combinations thereof.

14. A monolithic glaze or double glaze incorporating a heat-treatable solar control glass object (100) according to claim 1, a multilayer coating (200) preferably on surface 2, said substrate surfaces being numbered from the outer side to the inner side of the building or room equipped therewith, which provides a solar radiation protection effect.

15. A monolithic glaze or double glaze according to claim 14 having an emissivity value equal to or less than 80% and a solar factor less than or equal to 0.

6.

16. A building wall cladding panel of a curtain wall including a heat-treatable solar-controlled glass item (100) according to claim 1. 10 17. A side window, rear window or solar roof for a car or other vehicle formed by incorporating a heat-treatable solar-controlled glass item (100) according to claim 1.

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